Electricity customers who have been without their power for more than 12 hours will be eligible for payments from power provider ETSA in South Australia.

Weekend storms knocked out power supplies to about 150,000 properties across South Australia and about 1,600 are still without electricity.

Paul Roberts from ETSA says most people should have their power restored by Monday night.

He says some customers will get payments of up to $370.

"It's not compensation as such. Under the regulatory system there are guaranteed service level payments," he said.

"They're structured payments set by the regulator. They're processed automatically by ETSA Utilities and will be mailed out over the next few months, but they do take a little bit of time to work through."

The State Emergency Service has had hundreds more calls for help as bad weather continues to affect South Australia.

It has dealt with more than 2,000 calls since storms first hit on Friday.

Central region commander Derren Halleday says most of the calls have been about fallen trees and some houses will need significant repairs.

"Major damage has been right across the metropolitan area. There has been several roofs that have been lifted completely," he said.

"A lot of verandahs and pergolas that have been damaged significantly, chimneys that have been dislodged and trees that have come down across major metropolitan roads, across cars, and well and truly through people's houses."

Dams fill

Adelaide reservoirs are at 97 per cent of capacity, compared with 83 per cent a year earlier.

Several have overflowed, including Kangaroo Creek and Hope Valley.

Along the Murray, increased water flows from the Finniss River and Currency Creek have led to the Goolwa barrage near the Murray mouth being opened for the first time in four years.

Water Minister Paul Caica said the water level in the Goolwa channel was now 70 centimetres above sea level.

On the lower Murray, a wall was built in 2008 to allow water to be pumped from Lake Alexandrina into Lake Albert to help fight acidification due to prolonged drought.

Pumping stopped some time ago but the wall remained in place.

Chief executive of the Environment Department Allan Holmes says it is expected to be removed in the next few weeks.

"It was a temporary structure. It wasn't meant to be a control structure at all and is not constructed in that way," he said.

"We will have to remove that, I'm pretty sure.

"It served us very well because Lake Albert acidification was avoided."

Coorong mayor Roger Strother said it would be welcome news for locals.

"The communities around Lake Albert particularly will be looking forward to the day when that happens," he said.

Mr Caica said he was still waiting on advice from the Murray-Darling Basin Authority and would consult the local community before making a final decision, by early next week at the latest.

The weekend's highest rainfall in SA was at Blinman, with more than 122 millimetres.

Nearby Leigh Creek recorded just over 98 millimetres and Kimba on Eyre Peninsula also had 98 millimetres, compared with its September average of about 36 millimetres.

In the Mount Lofty Ranges, Millbrook received just over 95 millimetres and more than 93 mm fell at Uraidla.

Adelaide has had more than 51 mm for September, already nearing the monthly average of just over 60 mm.

Monarto Zoo, near Murray Bridge, will be closed for several days because the storms knocked over its radio tower.

The staff use radios to co-ordinate tourist buses and arrange to put animals back in their enclosures.

Zoos SA CEO Chris West says it is hard to operate the open range zoo without radio contact.

"We have a certain amount of mobile phone coverage. The staff do know what the routines are. It's working to make sure that the animals are fed and let out and looked after in the right way," he said.

Free trade is the oldest argument in federal politics and the issue that literally defined the federation era but opposition exists to the TPP, courtesy of the Investor-State Dispute Resolutions clause.